NPI Portal NPI Lookup & Verification

Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Mr. Stephen Merkle, MS PT OCS

Physical Therapist in Danbury, CT · enumerated 2006.

Data current as of Jul 13, 2026 · sourced from CMS NPPES

National Provider Identifier

1417998857

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Registry record

Entity type Individual (Type 1)
Name Mr. Stephen Merkle
Credential MS PT OCS
Sex Male
Practice address 22 Eagle Rd, Danbury, CT, 06810
Phone (203) 778-8326
Fax (203) 792-9170
Enumeration date Jun 9, 2006
Last updated in NPPES Jul 14, 2009

Taxonomy & licenses

225100000X Physical Therapist Respiratory, Developmental, Rehabilitative and Restorative Service Providers Primary

Other identifiers

Identifier Type State Issuer
513491 Other CT AETNA
06140156402 Other CT UHC

What is an NPI number?

A National Provider Identifier (NPI) is a unique 10-digit number that CMS assigns to every U.S. healthcare provider and organization under HIPAA. Type 1 NPIs identify individual providers; Type 2 NPIs identify organizations. The NPI appears on insurance claims, prescriptions, and credentialing paperwork, and never changes, even if the provider moves or changes specialty.

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Frequently asked questions

Is this the official NPI registry?
No. NPI Portal is a private site built on public CMS NPPES data. The official registry is npiregistry.cms.hhs.gov, operated by CMS.
What specialty is Stephen Merkle?
Stephen Merkle is registered in NPPES with the primary taxonomy of Physical Therapist. The taxonomy code describes the provider's classification and area of specialization for claims and credentialing.

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2009-07-14.